Current Conditions

Thornhill, Ontario

66°F19°C
Clear

Wind

NNW 14 mph22 km/h

Humidity

68%

Cloud Cover

26%

As of Wednesday, July 29, 2026 at 6:49 AM EDT

Today's Outlook

Day

Mostly clear and warm, with a high of 78°F25°C and morning low of 66°F19°C. Breezy from the NNW at 14 to 15 mph23 to 24 km/h.

Night

Mostly clear, with a low around 65°F18°C. Breezy from the NNW at 13 mph21 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
WednesdayJul 29ClearHigh 78°F25°CLow 65°F18°CPrecip 0 in0 mmCloud 19%Wind NNW 14 mph22 km/hWednesday: Mostly clear and warm, with a high of 78°F25°C and morning low of 66°F19°C. Breezy from the NNW at 14 to 15 mph23 to 24 km/h. Wednesday Night: Mostly clear, with a low around 65°F18°C. Breezy from the NNW at 13 mph21 km/h.
ThursdayJul 30ClearHigh 82°F28°CLow 61°F16°CPrecip 0 in0 mmCloud 6%Wind NNW 9 mph14 km/hThursday: Mostly clear and warm, with a high of 82°F28°C and morning low of 65°F18°C. Breezy from the NNW at 8 to 10 mph13 to 17 km/h. Thursday Night: Mostly clear, with a low around 61°F16°C. Breezy from the NNW at 9 to 12 mph15 to 19 km/h.
FridayJul 31Partly CloudyHigh 83°F28°CLow 59°F15°CPrecip 0 in0.1 mm5%Cloud 49%Wind WSW 5 mph8 km/hFriday: Partly cloudy and warm, with a high of 83°F28°C and morning low of 65°F19°C. Breezy from the SSW at 5 to 7 mph8 to 11 km/h. Friday Night: Mostly cloudy, with a low around 59°F15°C. Light wind from the WNW around 5 mph9 km/h.
SaturdayAug 1Light RainHigh 79°F26°CLow 69°F20°CPrecip 0.1 in2.5 mm42%Cloud 96%Wind NE 4 mph7 km/hSaturday: Overcast and warm, with a high of 79°F26°C and morning low of 70°F21°C. Light wind from the E around 4 mph7 km/h. 35% chance of drizzle throughout the day. Humid. Saturday Night: Overcast, with a low around 69°F20°C. Light wind from the N around 4 mph7 km/h. 42% chance of light rain throughout the night.
SundayAug 2Light RainHigh 74°F23°CLow 66°F19°CPrecip 0.48 in12.2 mm70%Cloud 71%Wind N 6 mph10 km/hSunday: Mostly cloudy and warm, with a high of 74°F23°C and morning low of 67°F20°C. Breezy from the N at 7 to 8 mph11 to 13 km/h. 70% chance of light rain throughout the day. Humid. Sunday Night: Mostly cloudy, with a low around 66°F19°C. Breezy from the N at 6 to 8 mph10 to 13 km/h. 58% chance of showers throughout the night.
MondayAug 3ClearHigh 78°F26°CLow 62°F16°CPrecip 0.04 in0.9 mm7%Cloud 18%Wind NW 7 mph11 km/hMonday: Mostly clear and warm, with a high of 78°F26°C and morning low of 64°F18°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. Monday Night: Mostly clear, with a low around 62°F16°C. Breezy from the NW at 7 to 8 mph11 to 13 km/h.
TuesdayAug 4ClearHigh 83°F29°CLow 61°F16°CPrecip 0 in0.1 mm1%Cloud 12%Wind SW 7 mph11 km/hTuesday: Mostly clear and warm, with a high of 83°F29°C and morning low of 65°F19°C. Breezy from the SSW at 7 to 10 mph12 to 15 km/h. Tuesday Night: Mostly clear, with a low around 61°F16°C. Breezy from the SW at 6 to 8 mph10 to 13 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 43.8150°N, 79.4242°W·Elevation: 175m·Timezone: America/Toronto·Population: 115,292